How to Grow and Care for Nightshades

Solanum lycopersicum is an annual or perennial herbaceous vine native to Central and South America that produces a large, juicy, edible fruit known as tomato. Today there are over 10000 cultivated varieties. Although tomato is the world’s most popular vegetable, botanically it is a fruit.

The species known as bittersweet is a semi-woody vine found in forests, marshes, shrublands, and hedgerows. All parts of the plant contain alkaloids (especially the bright red berries), which are extremely poisonous to humans and livestock if ingested. In spite of its toxicity, bittersweet was hung as a talisman in the past to ward off witchcraft.

Native to North America, eastern black nightshade is attractive but poisonous. Like many Solanum ptychanthum plants, all green portions of the plant contain the solanum alkaloid, which is highly toxic. Eastern black nightshade is shade-tolerant, so it can often be found growing in the shadow of crops. Bees and some beetles feed on the plant, but most other wildlife avoids it.

Ear-leaved nightshade (Solanum mauritianum) is a small shrub species that can live up to thirty years. Ear-leaved nightshade is native to South America, including Northern Argentina, Southern Brazil, Paraguay and Uruguay. This species is considered invasive in New Zealand and Australia, where is it known as tobacco bush weed. All parts of this plant, especially the berries, are toxic to humans.

The potato is native to North America and in the United States. Potato products are the second most consumed food. This starchy tuber is a staple in diets around the world and is considered the fourth most important worldwide crop.